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Finding the Third Proportional to 129,679,980 and 280,065,428

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Solution

The third proportional to 129,679,980 and 280,065,428 is: 604,847,748.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,679,980 : 280,065,428 = 280,065,428 : x
  2. Step 2: Convert to fraction form
    129,679,980/280,065,428 = 280,065,428/x
  3. Step 3: Cross multiply
    129,679,980x = 280,065,428 × 280,065,428
  4. Step 4: Simplify right side
    129,679,980x = 78,436,643,960,823,184
  5. Step 5: Solve for x
    x = 78,436,643,960,823,184/129,679,980
  6. Step 6: Final answer
    x = 604,847,748.75

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Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.